Steam-power stamp



(No Model.) 2 sheetssheet 1. W. S. lSHRINECK.

STEAM POWER STAMP.

' No.`272,485. Patented Feb.-20,1`883.

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(No Model.)

STEAM POWER STAMP. No. 272,485.

' Patented Feb.-zo, 1883.

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tion, reference being had therein tothe accom# UNITED SrzvrnfsV PATENT OFFICE.

WILLIAM S. SHARPNEOK, OF DENVER, COLORADO, ASSlGNOR OF TWO-v THIR'DS TO H. N. NICHOLS, VOF NORTH PLATTE, NEBRASKA.

ASTEAM-POWER STAMP.

SPECIFICATION forming part of Letters Patent No. 272,485, kdated February 20, 1883.

Application tiled October 31, (No model.)

To all whom it may concern:

Be it known that I, WILLIAM S. SHARP- NEGK, a citizen of the UnitedStates ot' America, residing at Denver, in the county ot' Arapahoe and State of Colorado, have invented certain new and useful Improvements in Steam-Power Stamps, of which the following is a specificapanying drawings. i

This invention relates toan improvementin steam or power stamps; and it consists, mainly, in the peculiar arrangement of the valves, and in certain details ot' construction, as will be more fully hereinafter described, and then pointed out in the claims.. 4

In the accompanying drawings, Figure 1 is a front view, showing a pairof stamps con.

structed according to my improvement, with the lower part shown in section. Fig. 2 is a vertical section through the line x 0, Fig. 1; Fig. 3, `a sectional view ofthe valves, Src., in a different position. Fig. 4 is a perspective view of the piston.

A represents the mortar of the machine, which may be made in the usual or any-suitable form.

B is a frame rising therefrom and supporting the cylinder O, in which Works the piston l) on the rod E, that passes through stuffingboxes F at each end of the cylinder, and through a guide, G, forming part of the frame, into the mortar A, where it is provided with a stamp-head, H, having utings or corrugations'around it, which may either be vertical lor inclined, as shown' in Fig. 1. The top ot' the piston-head is formed with two projections, each oi' which starts from the base of the vertical side of the other, as shown, so as to be vertical on one side and inclined on the other.

I represents the steam-chest, in which work two valves, J K, the former being operated by an eccentric, L, driven by a pulley, M, mounted on a shaft, N, journaled in the bearings O in the forked standard P, which slides in guidesV Q, Q, cast between the two steam-chests I. The standard P has a thread cut on it for a portion ot' its length, and a hand-wheel, R, (having a female thread to t -the thread of the staodard,) works on saidstandardbetween 5o the guides Q Q, as shown, by turning which the standard and the parts it carries can be raised and lowered as desired, and when in the desired position secured there by set-screws S S, which pass into a groove in the standard,

Vand thus prevent its turning in the guides.

The lower end of the standard is provided with an extension, T, on each side, to which the elbow-lever U is secured by a bolt, V. This elbow-lever has its long arm connected to the stamp-rod by a pitman, W, and its short arm is connected, as shown, to the rod X of valve K, the arrangement being such that when the stamp is down at or near its lowest point the valve K assumes the position shown in Fig. 3, thus cutting off the steam admitted by the valve J, and allowing steam to enter at the opposite end of the cylinder from which the valve J was admitting it. The pitman W is forked at Y, so as to embrace the collar ct, which works loosely on the stamp-rod between two collars, b b, which are iirmly fastened on the rod vby set-screws. The operation is as-follows: The mortar being supplied with materials to' be operated on and steam admittedto the chest I, motion is given to the valve'J by means of the bandwheel and eccentric, admitting steam, as shown by the arrow, thus driving-the stamp downward, and as the steam acts on the verf tical sides ot' the projections on the pistonthe latter and its rod are turned, thus giving'a turning motion to the stamp-head below, so as vto give a grinding as well as a crushing blow.

The motion of this valve being continued, steam is admitted and discharged in the usual manner so long as a suiiicient quantity of the material isin the mortar; but should there be a deficiency, so as to allow the stamp-bead to descend so far as to nearly strike the bottom ot' the mortar, then the valve K is made to assume the position shown in Fig. 3 by its con nection with the stamp-rod, and admits and exhaists steam as shown in said figure, thus forming a cushion of steam to prevent ,damaging the stamp-head and the die in the bottom of the mortar. By the .peculiar arrangement of the elbow-lever U and the pit-man W, the valve K is moved in the same direction at each end of the pistonsstroke.

The utes on the stamp'head act in two ways: They serve Whe-n arranged spirally to assist in giving a rotation to the st Imp-head` as it passes through the water, and they also act to some extent in stirring up the contents oi the mortar.

The pulley M may be driven by any suitable means, such as a band from a line-shaft whereit is convenient; but I sometimes impart rotary motion to the shaft N by a small independent engine, in which case a tiy-wheel may he substituted for the pulley M.

As the stamp-head and die wear away, the necessity ior the adjustment ofthe valves be cornes apparent, for as the head wears it will not ofcourse strike as low down, and the valve will require adjustment to overcome this change of stroke.

I have referred to the use of steam; but it is evident that the piston might be used with hot or compressed air or gas, should it be found more convenient in some situations. It is also evident that a crank or cam may be used in lieu of the eccentric. e

I am aware of Patent No. 187,947, in which a movable valve-seats is provided; but in that construction the said valve-seat is adapted to out o` the supply of steam admitted by the distribution-valve to one port, while it allows the exhaust from the other port to continue. In other words, the said movable seat has a very limited movement, which is only intended to cut; oft the supply of steam at one end of the cylinder and permit; the exhaust at the other, and is not constructed or adapted to admit steam to the opposite end ofthe cylinder to cushion the piston, asis the case in my improvement.

I am aware, also, oiPatents Nos.148,273 and 223,474, and such arrangements and constructions are not sought to be covered in this application.

I am also aware that various spiral devices have been employed to change the position of plungers in rock-drills and the like, and such devices have generally been made to operate ou the npstroke or at the end of the upstroke through the medium ot'other devices or means. In my construction the upper surface of the piston-head is provided with two inclines, which serve to aiect the hammer H on the downstrolie only to give a grinding blow.

l. The combination, with a steam-cylinder and piston, ot' two valves, each acting independently otl the other, the motion of one being derived from the piston by mechanism, substantially as described, constructed to move the valve in the same direction at each end ofthe pistons stroke, and the other valve operated in the usual manner, as set forth.

2. The combination, with a power-stamp, ot' two valves, each acting independently ot' the other, constructed and arranged to allow the iirst to admit steam to operate the piston, and the second to cut ott the steam admitted by the tirst and admit steam at the opposite end, to cushion the piston when the stamp descends too far, substantially as described.

3. The combination, with a power-stamp, ol two valves, J IfI, in the same chest, the eccentric L, and suitable connections between said valves and eccentric, the stamp-rod E, pitman IV, elbow-lever U, and rod X, whereby the valve K is moved inthe same direction at each end of the pistons stroke, substantially as and for the purpose specified.

e. The combination, with a powerstamp, oi' two valves working in the same steamehest, one forming a seat for the other, and devices for operating them, constructed and arranged to adjust both valves and the operating devices simultaneously lengthwise of the cylinder, and devices for holding the adjustment during the motion of thevalves, substantially as and lor the purpose spcoicd. t

5. The combination, with a power-stamp, oi' two valves working in the same steam-chest, and one forming a seat for the other, a stand ard moving in a guide and provided with means for adjustment, thc shat't M, eccentric L, mounted on said standard, connections between the eccentric and one valve, and the le. ver U, also mounted on the standard and connected tothe other valve, substantially as and for the purpose specified.

In testimony whereof I atiix my signature, in presence of two witnesses, this Aith day ot' October, 1882.

WILLIAM S. SHARPNECK.

Titnessesz T. J. W. ROBERTSON, F. O. MGCLEARY. 

